61 lines
2.2 KiB
C++
61 lines
2.2 KiB
C++
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//===-- CGOpenMPRuntimeAMDGCN.cpp - Interface to OpenMP AMDGCN Runtimes --===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// This provides a class for OpenMP runtime code generation specialized to
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// AMDGCN targets from generalized CGOpenMPRuntimeGPU class.
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//
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//===----------------------------------------------------------------------===//
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#include "CGOpenMPRuntimeAMDGCN.h"
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#include "CGOpenMPRuntimeGPU.h"
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#include "CodeGenFunction.h"
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#include "clang/AST/Attr.h"
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#include "clang/AST/DeclOpenMP.h"
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#include "clang/AST/StmtOpenMP.h"
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#include "clang/AST/StmtVisitor.h"
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#include "clang/Basic/Cuda.h"
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#include "llvm/ADT/SmallPtrSet.h"
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#include "llvm/IR/IntrinsicsAMDGPU.h"
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using namespace clang;
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using namespace CodeGen;
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using namespace llvm::omp;
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CGOpenMPRuntimeAMDGCN::CGOpenMPRuntimeAMDGCN(CodeGenModule &CGM)
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: CGOpenMPRuntimeGPU(CGM) {
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if (!CGM.getLangOpts().OpenMPIsDevice)
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llvm_unreachable("OpenMP AMDGCN can only handle device code.");
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}
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llvm::Value *CGOpenMPRuntimeAMDGCN::getGPUWarpSize(CodeGenFunction &CGF) {
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CGBuilderTy &Bld = CGF.Builder;
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// return constant compile-time target-specific warp size
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unsigned WarpSize = CGF.getTarget().getGridValue(llvm::omp::GV_Warp_Size);
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return Bld.getInt32(WarpSize);
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}
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llvm::Value *CGOpenMPRuntimeAMDGCN::getGPUThreadID(CodeGenFunction &CGF) {
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CGBuilderTy &Bld = CGF.Builder;
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llvm::Function *F =
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CGF.CGM.getIntrinsic(llvm::Intrinsic::amdgcn_workitem_id_x);
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return Bld.CreateCall(F, llvm::None, "nvptx_tid");
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}
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llvm::Value *CGOpenMPRuntimeAMDGCN::getGPUNumThreads(CodeGenFunction &CGF) {
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CGBuilderTy &Bld = CGF.Builder;
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llvm::Module *M = &CGF.CGM.getModule();
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const char *LocSize = "__kmpc_amdgcn_gpu_num_threads";
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llvm::Function *F = M->getFunction(LocSize);
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if (!F) {
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F = llvm::Function::Create(
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llvm::FunctionType::get(CGF.Int32Ty, llvm::None, false),
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llvm::GlobalVariable::ExternalLinkage, LocSize, &CGF.CGM.getModule());
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}
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return Bld.CreateCall(F, llvm::None, "nvptx_num_threads");
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}
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